About 5 cups
Homemade whey is easy to make from good quality plain yoghurt, or from raw or cultured milk. You will need a large strainer that rests over a bowl.
If you are using yoghurt, place 2 quarts in the strainer lined with a tea towel. Cover with a plate and leave at room temperature overnight. The whey will drip out into the bowl. Place whey in clean glass jars and store in the refrigerator.
If you are using raw or cultured milk, place 2 quarts of the milk in a glass container and leave at room temperature for 2-4 days until the milk separates into curds and whey. Pour into the strainer lined with a tea towel and cover with a plate. Leave at room temperature overnight. The whey will drip out into the bowl. Store in clean glass jars in the refrigerator.